diag: Continue through the loop if condition fails for a proc

Exiting the loop for do_switch condition fail for a single proc
should not prevent the switch for other procs. Continue looping
through to update the mode switch for other procs.

Change-Id: Iba154ec7425bdcd7645659d03a4cc884bdd88331
Signed-off-by: Lakshay Verma <laksverm@codeaurora.org>